Arduino Compatible 8 Channel Relay Board

These handy relay modules provide the easiest way to use your DuinoTECH to switch real world devices. Available in one, four and eight channel versions, these modules can switch up to 10A per channel. Includes back-EMF protection and LEDs so you can easily see the state of the outputs. The four and eight channel versions even have optical isolation to protect your DuinoTECH. While the one channel version operates directly from 5V.